Production of new superheavy Z=108-114 nuclei with $^{238}$U, $^{244}$Pu and $^{248,250}$Cm targets

TL;DR

This paper uses the dinuclear system model to analyze the production cross sections of superheavy nuclei with Z=108-114 using actinide targets, identifying optimal conditions for their synthesis.

Contribution

It systematically evaluates production cross sections and suggests feasible combinations of actinide targets and energies for synthesizing new superheavy isotopes.

Findings

Production cross sections decrease with increasing Z.

Larger mass asymmetries enhance cross sections in 2n-5n channels.

Feasible synthesis pathways are identified for superheavy nuclei.

Abstract

Within the framework of the dinuclear system (DNS) model, production cross sections of new superheavy nuclei with charged numbers Z=108-114 are analyzed systematically. Possible combinations based on the actinide nuclides $^{238}$U, $^{244}$Pu and $^{248,250}$Cm with the optimal excitation energies and evaporation channels are pointed out to synthesize new isotopes which lie between the nuclides produced in the cold fusion and the $^{48}$Ca induced fusion reactions experimentally, which are feasible to be constructed experimentally. It is found that the production cross sections of superheavy nuclei decrease drastically with the charged numbers of compound nuclei. Larger mass asymmetries of the entrance channels enhance the cross sections in 2n-5n channels.